Tried switching from 4WD to 2 WD, it went into neutral. Mechanic said it is not the motor . I have a 1998 Ford Expedition with 215K miles.

There's a good chance the electric shift motor is bad. Can you tell if you're in 2-WD or 4-WD? Making a slow, sharp turn will feel different - difficult, clunky - in 4WD.

It's possible to get a manual conversion kit, but that won't solve the light issue, which wouldn't matter at that point, anyway. It could also simply be a wiring problem, with current not getting from Point A to Point B. Checking the OBD II will probably give you several codes, which might help.

I had the electric switching on my Expedition, and it went bad. Not cheap to repair.

Leighjean,If it is stuck in 4-wheel drive, you have to do this.#1 With engine running,shift to neutral.#2 Switch the dash conrtol to A4D (or 2WD).#3 Push on the brake pedal.(This is important) You shuold be ready to go in A4D or 2 WD.

Both conditions:
* 8 Cylinders VIN 6 4.6L EFI SOHC Windsr 1998 Ford Expedition 4WD
* 8 Cylinders VIN L 5.4L EFI 1998 Ford Expedition 4WD
* 8 Cylinders VIN W 4.6L EF 1998 Ford Expedition 4WD

I suggtes visit your dealer.

try the old battery cable discnnect for20mins the positive one

jeep look under crysler ,as for code you have this is not a crysler jeep code ,its a autozone code so go back and ask them what this code means because its not a genuine manufacturers code ,go and get your money back unless they can give you a proper diagnostics instead of a weekend mechanic boy racer answer

solenoid switch that engages the 4WD more likely will need replacing. fairly cheap to fix replace.

Go back and talk to the service manager. If he wont do anything go to his higher up.

With any 4WD like this, always move a few feet in the opposite direction when disengaging. If you were moving fwd in 4wd, switch to 2wd, back up a few feet, then go fwd.

unhook the battery for about 5 mins. this will reset the powertrain control module (PCM) that would be a good start, is this a king ranch? or just a basic f-150?

Today I fixed the vacuum lines to the front differential (nee transaxle). I had trouble finding parts in the local auto store that would do the trick - but I got something cobbled together. Based on my experience, I can go back to the store and get the right parts for a proper fit.

As of now, 4WD will engage but will not disengage - clearly one of the connections is still poor, or I accidentally switched the ports, or the vacuum shift motor (attached to the front differential) is shot (obviously from abuse).

As near as I can tell, once I switch into 4WD-HI, it will not shut off. 4WD-LO will engage and disengage properly. If I turn the car off for a while, a couple of times 4WD has disengaged. Hmmm...